liter of 1.06 M lithium phosphate solution? 2.5 L soln x 1.06 mol Li3PO4 x 115.79g Li3PO4 = 310g Li3PO4 1 L soln 1 mol Li3PO4 10. If you evaporated 250. mL of a 3.5 M solution of iron (II) nitrite‚ what mass of iron (II) nitrite would you recover? 0.250 L soln x 3.5 mol Fe(NO2)2 x 147.86g Fe(NO2)2 = 130g Fe(NO2)2 1 L soln 1 mol Fe(NO2)2 11. A chemist has 4.0 g of silver nitrate and needs to prepare 2
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A dark purple soln was created from tetraphenylcyclopentadienone (0.506 g‚ 1.32 mmol) and glyme (3 mL) in a large reaction tube with a boiling chip. Isoamyl nitrite (0.35 mL‚ 2.9 mmol) was added slowly via syringe to the soln‚ and the soln was allowed to gently reflux over a sand bath for 5 min. Another soln was made in a separate reaction tube by dissolving anthranilic acid (0.250 g‚ 1.82 mmol) in glyme (2
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The Bokkie Park has a large range and number of animals so the waste produced by these animals is quickly washed into the water body and the nitrates and nitrites level in the water increases. Research on water quality at the Bokkie Park: “Ekurhuleni Metro advises residents of Boksburg and visitors to the Bokkie Park not to be alarmed at the state of the facility‚ following flood damage caused by heavy rains
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Tetrapyrrole compounds: chlorophyll and heme groups By Erwin Lim 1. Tetrapyrrole compounds A tetrapyrrole compound is a chemical group that consists of four pyrroles that are joined together by covalent bonds‚ forming a porphyrin ring. They are naturally occurring pigments‚ which are used in many biological processes (Berg‚ 2009). The basic structure of a tetrapyrrole is as seen in Figure 1‚ while the basic structure of a pyrrole is as seen in Figure 2. Figure 1.Tetrapyrrole Compound (Berg
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Unknown Lab Report April 25th‚ 2006 Introduction The purpose of this lab was to identify two unknown bacteria cultures using various differential tests. The identification of these unknown cultures was accomplished by separating and differentiating possible bacteria based on specific biochemical characteristics. Whether the tests performed identified specific enzymatic reactions or metabolic pathways‚ each was used in a way to help recognize those specifics and identify the unknown cultures
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100mL round-bottomed clask which was equipped with a Claisen adapter and reflux condenser and warmed using the thermowell at about 30%. Anthranilic acid and 1‚2-dimethoxyethane were dissolved together and placed into the addition funnel. Isoamyl nitrite was added to a test tube containing 1‚2-dimethoxyethane. The two solutions were added slowly over 45 minutes under reflux. After completion of the addition‚ the reaction was warmed under reflux for an additional 15 minutes.
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Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin‚ isosorbide dinitrate‚ and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking Viagra with a nitrate medicine can cause a sudden and serious decrease in blood pressure. Slideshow: The Rise to Fame: Viagra‚ PDE5 Inhibitors‚ and ED The Rise to Fame: Viagra‚ PDE5 Inhibitors‚ and ED Contact your doctor
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Eutrophication Introduction Europhication (the over enrichment of aquatic ecosystems with nutrients leading to algal blooms and anoxic events) is a persistent condition of surface waters and a widespread environmental problem (Carpenter‚ 2005). The main cause is excessive loading into the system of phosphorus and nitrogen‚ resulting in high algal biomass‚ dominance by cyanobacteria‚ and loss of macrophytes (Dixit‚ 2005). When the nutrient concentrations rise to extremely high levels‚ eutrophication
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Lecture based on Materials (Book: The science of strong materials‚ Penguin Publishers.) The aeronautical journal (Library can order for you)‚ one article written in 1996‚ by Peal‚ I.J.Mocolm. Ceramic Science‚ pg 123-131. (Relevant to exam) There are two key reasons for using thermoplastic composites: * save time & handling costs in production * eliminate labour-intensive riveting & bonding * can produce large profile sections that are some 20 % lighter than metal &
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local systems. Organically produced foods are widely believed to satisfy the above demands‚ leading to lower environmental impacts and higher nutritive values. So far‚ studies have partly confirmed this opinion. Organic crops contain fewer nitrates‚ nitrites and pesticide residues but‚ as a rule‚ more dry matter‚ vitamin C‚ phenolic compounds‚ essential amino acids and total sugars than conventional crops. Organic crops also contain statistically more mineral compounds and usually have better sensory
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